Fix blank page on language switch by keying Layout to locale

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: 2 people

docs/.vitepress/theme/Layout.vue

@@ -1,13 +1,15 @@
 <script setup>
 import DefaultTheme from 'vitepress/theme'
+import { useData } from 'vitepress'
 import LicenseSelector from '../components/LicenseSelector.vue'
 import PixelRobots from '../components/PixelRobots.vue'
 
 const { Layout } = DefaultTheme
+const { lang } = useData()
 </script>
 
 <template>
-  <Layout>
+  <Layout :key="lang">
     <template #home-hero-image>
       <LicenseSelector />
     </template>